A razor-sharp running utility, race time predictor and training zone calculator for runners, cyclists and endurance athletes. Everything runs on your device. No permissions, no GPS, no paywalls.
The same math that powers the app, running right here in your browser. Nothing leaves this page.
| Km | Split | Elapsed |
|---|
Riegel: T2 = T1 × (D2 / D1)^1.06. Tap a result card to load its split table.
Karvonen: target = rest + (max − rest) × intensity.
Edit pace or speed; the other side updates instantly.
Enter one result and see 5K, 10K, Half and Marathon finish times via Riegel's formula, with full km split tables.
Z1 to Z5 computed with the Karvonen formula from your resting and max heart rate.
Flip between min/km and km/h in a tap, plus an offline race strategy to plan every kilometer.
Archive personal bests, race goals and training notes, stored privately on your device.
No location, no GPS, no accounts. The app never asks for anything.
No subscriptions, no paywalls, no network needed. Open it at the start line and go.
🏃 We are a small crew of runners, cyclists and tinkerers who got tired of bloated fitness apps that wanted our data more than our miles.
🎯 Our mission is simple: give every endurance athlete precise, honest numbers without trading away their privacy.
⏱️ PacePulse hands you race predictions, heart rate zones, pace conversions and a private vault for bests, goals and notes, all working offline.
🛡️ It matters because training is personal. Your pulse, your pace and your plans stay in your pocket, where they belong.
Run smart. Stay private. Own your pace.
Effective Date: October 2026
PacePulse: Endurance Studio does not collect, store or share any data. Every calculation and every saved note stays on your device.
None. We do not collect personal information, health data, heart rate values, race times, location or device identifiers.
Since nothing is collected, nothing is used, analyzed, profiled or sold. Values you enter are processed instantly on your device to produce results.
Personal bests, race goals and training notes in the Endurance Vault live only in local app storage. There is no cloud, no server and no sync.
The app contains no analytics, advertising networks, trackers or external SDKs, and works fully offline.
Because data never leaves your device, it is protected by your device's own security, such as passcode and encryption. The app requests no permissions and has no network access to exploit.
The app collects no information from anyone, including children under 13, and is consistent with COPPA principles. It contains no ads, accounts or social features.
You hold all of your data. Delete it at any time by removing vault entries or uninstalling the app. There are no accounts to manage or close.
If this policy changes, we will update the effective date above. Our commitment to collecting no data will not change quietly.
Questions about privacy? Write to privacy@pacepulseendurancestudioapp.com.
👋 Got a question, a feature idea or a PR story to share? We'd love to hear from you, so drop us a line.
hello@pacepulseendurancestudioapp.com
Technical supporthelpdesk@pacepulseendurancestudioapp.com
Business & partnershipspartners@pacepulseendurancestudioapp.com
⏳ We typically reply within 24–48 hours.